Truck vs. Car LSD. Will it fit?

[Paul Y]

Good morning again Gentlemen,

This mornings thoughts over my cup of tea are around the suitability and interchangeability of Limited Slip Diffs.

My truck currently has an open differential and this started my search for a suitable locking version. Budget won't quite stretch to a new Eaton set up so looking at used parts.


From research the truck diffs seem to be tough but are either off or on and seem to have a reputation for breaking if wheel speed differs side to side by a margin. Also disengage completely at over 20mph. Is this true from your experiences? Is there a particular year or model I should be looking at that has better characteristics?

I do have a clutch style diff from an old Camaro axle, will that fit a truck casing?

Thanks for the advice,

Regards.

P.

[Woogeroo]

Just so you know, for our generation 60-66 trucks, chevy/gmc manuals referred to them as :

posi-traction

prolly some marketing thing... may help ya in looking up information.

-W

[Paul Y]

I should have know that! Thank you for reminding me, must be a Tea thing....

Will a car posi fit in a truck casing?

I will use the power of th internet to look it up but, if there is a super secret spy ring decoder needed to extract the exact part numbers, I would appreciate the loan until I am deemed responsible enough to have one of my own....

P.

[Clyde65]

call randy's ring and pinion and ask them. then you get it from an expert.

[chevy_mike]

Short answer is no. Car 12 bolt is different then a truck 12 bolt.